Thomas martin



@uiten .faire @anni @fitta Letters PacntNo. 77,745, dated away 12, 1868.

IMPROVEMENT IN ATTAGHING DOOR-ENOES I'O SPINDLES..

@in ,st-taiwan renna tu in tlgtst i'tttets iight-toit mit mating peut at tigt simu.

TO ALL WHOM IT-MAY CONOERN: t

Be it knenfn that I, THOMAS ll'IARVIm ouri/ty) of Middlesex, and State o t' Massachusetts, haveinventea an Improvement in Door-Knobs and Spindles; and I do hereby declare that the following, taken in connection with the drawings which accompany and form part ci' this specification, is a description of my invention Sullicient to enable those-skilled in the art to practise it.

',lhe invention relates to the inanner oi' fastening door-knobs upon spindles, with a view to dispense with the pin usually driven through the handle and spindle to hold them together. The use of this pin is objectionable, because it is unsightly, ybecause it is continu-ally dropping out of place, and because its use involves the necessity of adjusting the length of' the spindle or the point at which it is to be bored, in accordance with the thickness of the door to which the knobs are to be applied. i

In my invention I use, in connection with each knob, a spindle-socket,having a journal orcylindric surface, upon which the escutcheon tits, witha lange at the end of such socket to keep the handle from being drawnfrom the escutcheon; thc cscuteheon being made to be screwed upon'the door, and having also ashoulder, upon which a disk, applied 4to thevinner' end of theknob, tits, this disk bein" confined to the knob by turning a. peripheral lange back and down upon the neck oi' the knob. 'lhe shank of the socket-piece issquare in section, and fits into a knob-mortisc, which is-made square, to receive it, and to cause it to .turn'with and only with the knobt The spindle is-coniined to the socket-piece of one knob by a suitable pin passing only through the socket and spindle, and the opposite end ofthe spindle slides' freely in its knob-socket, it being confined 4in position relative thereto, when the knobs are applied, by the confinement ofv the two escutcheon-plates to' the opposite surfaces of the door.

It is this construction that constitutes my invention, and the drawing represents a .sectional view of the two knobs and spindle.

a denotes the spindle; b In', the-knobs, the spindle being confined to knob I). c c' denote the escutcheons, each provided with holes, d, for entrance of screws to fasten them to the ldoor-faces. Each of these cscutcheons has a central bearing or circular l1ole,f,.i'or supporting the spindle-socket piece g,.wl1ich has a square mortise, o, for receiving the lsquare spindle, and oniits outer surface a cylindrical shoulder, h, which ts Vinto thev escutcheon-bearingf, and rotates therein, the socket-piece having a lip or flange, z', against which the inner surface oi` the escutcheon rests', and the shoulder .L being-'cfa width corresponding`to the thickness of the escutchcon, as seen in the drawing. Attire outer end of 'the shoulder 7L is a metal disk ,or plate, i', which slips upon the socketfpiece g,wl1ich may rest upon n shoulder, k, thereof, and this disk may be brazed or soldered to the socket-piece, and be thereby fixed relatively thereto. v I i The .outer surface of the shank of the soc'k'ct-pieceg` is preferably made square in section, and the mortis@ x, in the knob, also has this form, to insure the rotation ofthe spindle, by rotation Aof the handle, and each disk, z", has at its outer yedge a peripheral flange, Z, which is turned down upon the handle-neck, as seen in the drawing, und-the turning over of this langc secures the knob to the disk, and thereby to the spindle-socket piece. The spindle slides in each socket-piece; or is made capable of such movement, though to one end ofthe spindle :it is preferably confined by a pin, m., passing through the spindle and socket-piece. Y

Thespindle and the socket inone knob are made ot' such -length and depth as will enable the knobs to be applied to doors of all thicknesses. c i When the knobs are to be applied to'aI door, the spindleis thrust through the door, 'andthe cscutcheon e is screwed to the face thereof. "lhis attaches-the spindle and knob b. The knob b isthen slid upoirthe opposite end of the spindle, and theescuteheonc is screwed. to the door, and this not -only confines the knob b to vthe door, but to the spindle, so that by turning either knob, the latch is'operatcd in the usual manner.

.As in turning the knob, the cylinder t turns in the escutcheon, and as this bearing is of much larger. diam- 'eter than the spindle, it will readily be seen that' the knob is kept'from sagging andv from loosening, the lip z' holding the socket-piece steadily inA position, andv as there isno piu connecting the spindle and handle, thehandle cannot become loose or .detached byjvear of this pin, or by its dropping from its place.

I claim the combination of the stationary escutcheons, the spindle, the spindlcfsockets, ivith 'the shoulder t and lange t', the disks andthe knobs, when constructed, connected, and relatively arranged, substantially as described.

THOMAS MARVIN.

Witnesses:

J; B. CROSBY, FRANCIS GOULD. 

